Re: [dpdk-dev] DPDK 1.7 - rte_eth_dev_flow_ctrl_set API returns error code -95

[Neil Horman <nhorman@tuxdriver.com>]

On Tue, Mar 17, 2015 at 02:51:26PM +0000, Bhat, Sharat (Nokia - IN/Bangalore) wrote:
> Hello ,
> 
> We have 30 VF's  and  first 15 VF's are handled by DPDK i.e. bound to igb_uio and PF is boud to ixgbe driver.
> 
> I am trying  to set Flow Control parameters for a VF/port using rte_eth_dev_flow_ctrl but it always returns error code -95.
> 
> Same error code is returned by tetspmd application as well.
> 
> "testpmd> set flow_ctrl rx off 0
> cannot get current flow ctrl parameters, returncode = -95" .
> 
> 
> If Any one of you are succeeded in setting  flow control parameters for a VF using DPDK 1.7 , please help me .
> 
> I was expecting  at least testpmd application should work  with flow control set API, but it is not the case.
> 
> I have tried to switch of Flow Control using  ethtool for PF  , no error message,  but its not reflecting the changes.
> 
> 
> Thanks and Regards,
> Sharat Bhat
> 
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There is no VF pmd in dpdk with a flow_ctrl_set method registered.  As such,
every attempt to set flow control will return -EOPNOTSUPP (-95)
Neil